Modularizing your iOS apps

Originally posted here: https://speakerdeck.com/alexandervoronov/modularizing-your-ios-apps

Github link: https://github.com/cocoaheads-kyiv-14-workshop

Воркшоп включает в себя:
- Причины для разделения iOS-приложения на модули
- Инструменты для быстрого и простого разделения
- Подходы при проектировании модульного приложения
- Преимущества и недостатки разделения на модули
- Критерии, которые сигнализируют о том, что лучше вернуться к монолиту

This workshop was made for CocoaHeads Kyiv #14 which took place Oct 6 2018.

Transcript

1. MODULARIZING
   YOUR IOS APPS
   WORKSHOP
   @aleks_voronov • CocoaHeadsKyiv#14
   

   View Slide

2. AGENDA
   @aleks_voronov • CocoaHeadsKyiv#14
   

   View Slide

3. REASONS
   @aleks_voronov • CocoaHeadsKyiv#14
   

   View Slide

4. TARGET TEAMS
   @aleks_voronov • CocoaHeadsKyiv#14
   

   View Slide

5. QUICKLY INTRODUCE
   NEW TEAM MEMBERS
   !"
   @aleks_voronov • CocoaHeadsKyiv#14
   

   View Slide

6. INDEPENDENT FEATURES
   @aleks_voronov • CocoaHeadsKyiv#14
   

   View Slide

7. COMPLEX CONTEXT
   @aleks_voronov • CocoaHeadsKyiv#14
   

   View Slide

8. REUSABLE COMPONENTS
   @aleks_voronov • CocoaHeadsKyiv#14
   

   View Slide

9. COMPILATION TIME*
   * Analyze your code first: -Xfrontend -warn-long-expression-type-checking=200
   @aleks_voronov • CocoaHeadsKyiv#14
   

   View Slide

10. !
    BENEFITS
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

11. YOUR TEAM – YOUR RULES
    ▸ Own processes
    ▸ Own development flow
    ▸ Less merge conflicts
    ▸ Only your changes
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

12. SMALLER FEEDBACK CYCLE
    ⏱
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

13. EASIER TO TEST
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

14. EASIER TO REASON ABOUT
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

15. EASIER TO INTEGRATE
    IN DIFFERENT ENVIRONMENT
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

16. !
    EXPERIMENTING
    ▸ Language
    ▸ System Design
    ▸ Technologies
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

17. DRAWBACKS
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

18. INTEGRATIONS
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

19. LESS INVOLVEMENT
    IN OTHER MODULES
    ! "
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

20. HOT-PATCHING
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

21. RESOURCES MANAGEMENT
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

22. TIPS & TRICKS
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

23. !
    WHERE TO START?
    ▸ Non Vital
    ▸ Least Dependent (Analytics, Logging, Utils, Networking)
    ▸ Just Copy-Paste
    ▸ Gradually Integrate alongside Original Implementation
    ▸ Deprecating vs Removing
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

24. WALKING SKELETON FIRST
    ☠
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

25. SLOWLY
    INTRODUCE IT
    TO YOUR TEAM
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

26. LOCAL
    ⚔
    REPO
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

27. VERSIONING
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

28. CODE REVIEW
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

29. S O L I D
    ▸ Private / Internal by Default
    ▸ Add / Open things ONLY when needed
    ▸ Composition vs Inheritance
    ▸ Invert Dependencies
    ▸ Extending vs Changing
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

30. @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

31. TOOLKIT
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

32. GIT SUBMODULES
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

33. SWIFT PACKAGE MANAGER
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

34. CARTHAGE
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

35. COCOAPODS
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

36. !
    MONOLITH?
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

37. SMALL PROJECT
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

38. SMALL FEATURE
    ...
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

39. SMALL FEATURE
    NOT REUSABLE UTILITY
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

40. FEATURE & PROJECT
    ARE TIGHTLY COUPLED !
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

41. FEATURE STAGE
    DEVELOPMENT → SUPPORTING
    !
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

42. YOU’RE A SMALL STARTUP
    IN ITS EARLY STAGE
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

43. LET'S CODE!
    GITHUB.COM/COCOAHEADS-KYIV-14-WORKSHOP
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide

44. THANKS!
    @ALEKS_VORONOV
    @aleks_voronov • CocoaHeadsKyiv#14
    

    View Slide